Blowing-engine valve.



PATENTED JAN. 80, 1906.

J. KENNEDY. BLOWING ENGINE VALVE. APPLICATION. FILED JUNE 20. 1903,

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J. KENNEDY. BLOWING ENGINE VALVE.

APPLICATION FILED JUNE 20. 1903.

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JULIAN KENNEDY, OF PITTSBURG, PENNSYLVA NIA.

BLOW! NGr-ENGl N E VALVE.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed Jane 20,1903. $e1'ial No 162,394.

To (l/ZZ whom it may concern:

Be it known that I, JULIAN KENNEDY, of Pittsburg, Allegheny county,Pennsylvania, have invented a new and useful Engine-Valve, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, forming part of this specification, inwhich Figure 1 is a central vertical section of a blowing-engineprovided with my improved valve. Fig. 2 is an enlarged transversesection of one of the valves. Fig. 3 is a side elevation of the valveremoved. Fig. l is a bottom plan view of the same, and Figs. 5 and 6 aredetail views showing the strip and plug packing.

My invention relates to engine-valves of the rocking or Corliss type,and is especially advantageous for blowing-engines, though it may beused for other purposes, and it is designed to reduce the wear on suchvalves and to provide an efticient and durable packing therefor.

With this object in view my invention consists in the novelconstruction, arrangement, and combination of parts, all substantiallyas hereinafter described, and pointed out in the appended claim.

In the drawings, 2 represents a blowingcylinder of the vertical type,having its piston-rod 3 connected to the piston-rod 1 of a steam-enginecylinder in endwise alinement with the blowing-cylinder. The wind-boXes5 5 at the ends of the blowing-cylinder are preferably formed integrallywith its heads, and each is provided with a rocking inletvalve 6 and arocking outlet-valve 7. These valves are separated by a transversepartition 8, extending through the wind-box, and control ports 9 and 10,leading into the end of the cylinder 2. The ports are provided witharc-shaped seats which are extended within the partition 8, thevalve-face 11 being in the form of the segment of a cylinder. 7

The valves are similar to each other in construction, and each consistsof a longitudinal central web 12, having upper flanges 1.2 andstrengthening-ribs 13 on each side and provided with a series oftransverse holes 14 between the ribs. At its lower edge the Web mergesinto the curved face 11 of the valve, which face is thickened near itsouter edges at 15, the thickened portions having longitudinal recessescontaining the longitudinal metallic packing-strips 16. The thickenedportions at their ends merge into sockets 17 adjacent to the end plates18 of the valve, and in these sockets are placed cylindrical plugs 19,the lower portions of which are hollow and contain spiral springs 20.The outer portions of the plugs are recessed to receive the ends of thelongitudinal strips 16 and also the ends of cross packing-strips 21 atthe ends of the valves. These end packing-strips 21 are set at an angledifferent from a right an gle to the longitudinal strip to preventwearing a groove in the seat, and their edges are curved to lit theconcave face of the seat. Each valve is thus provided with a continuousmetallic packing which entirely surrounds the port when the valve isclosed and bears upon the seat.

The valve is entirely supported upon end trunnions 22 and 23. Thetrunnion 23 is carried within a pocketseat at one side of the wind-box,while the longer trunnion 22 projects through a bearing at the otherside of the wind-box and is provided with a crank which is suitablyconnected with the moving part of the engine, so that the valve isrocked at the proper time in the ordinary manner. The entire valve, withits trunnions, is preferably cast in one piece, the plugs and stripsthen being inserted. The strips 16 and 21 are preferably backed up bycorrugated stripsprings 24, so that all of the strips are yieldinglypressed against the valve-seat. The valve-body does not rest upon theseat, its weight being supported on the trunnions. The valveisunbalanced, the closed portion being along one side only, so that theweight rests upon the trunnions.

The advantages of my invention result from the peculiar construction ofthe rocking valve. The weight of this valve is carried on the endtrunnions instead of upon the valve-seat, thus greatly reducing theWear, and the metallic packing effectually seals the Valve When inclosed position.

The Valve may be used for steam-engines 5 or other purposes, and manyVariations may be made in the form and arrangement of the Valve Withoutdeparting from my invention.

I claim A Valve having a longitudinal curved face 10 With spring-pressedpacking-strips, the end strips extending at an angle other than'a rightangle to the longitudinal strips; substantially as described.

In testimony whereof I have hereunto set my hand.

JULIAN KENNEDY.

Witnesses:

GEO. B. BLEMING, H. M. CORWIN.

